Portal
15 achievements
Ultra Rare×5
Very Rare×4
Rare×1
Uncommon×1
Common×4
About Portal's achievements
Portal has 15 Steam achievements, 5 of them ultra-rare — unlocked by under 5% of players. The rarest is "Basic Science", earned by just 2.8% of players. Across 3 SteamVault hunters who reached 100%, full completion takes a median of about 6 hours. Below is the complete achievement list with global rarity, a difficulty breakdown, and a SteamVault guide for every achievement.
Rarest achievement
2.8%
of players earned "Basic Science"
SteamVault 100%s
3
members fully completed it
Median to 100%
6h
typical time to full completion
Portal achievement difficulty
5
33%
33%
Ultra Rare
4
27%
27%
Very Rare
1
7%
7%
Rare
1
7%
7%
Uncommon
4
27%
27%
Common
Distribution of all 15 achievements by global unlock rate
SteamVault community to 100%
Real Steam playtime from 3 hunters who fully completed this game. Not estimates — actual hours played.
5.3h
Fast 25%
6.2h
Typical
6.2h
Thorough
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Where to get it
View on SteamCommunity Ratings
No ratings yetDifficulty—
Easy → Brutal
Enjoyment—
Meh → Loved it
Grindiness—
No grind → Huge grind
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All Portal achievements
15 achievements
Ultra Rare2.8%
Ultra Rare2.8%
Ultra Rare2.8%
Ultra Rare4.1%
Ultra Rare4.3%
Very Rare9.0%
Very Rare9.2%
Very Rare12.0%
Very Rare14.1%
Rare18.1%
Uncommon48.5%
Common52.1%
Common55.4%
Common63.2%
Common81.0%